package io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * 通过提高每次读写的数据量，减少实际读写的次数可以提高效率
 */
public class CopyDemo2 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("建昌项目.zip");
        FileOutputStream fos = new FileOutputStream("建昌项目_cp2.zip");
        byte[] data = new byte[1024*10];
        int d;
        long start =System.currentTimeMillis();
        while((d=fis.read(data))!=-1){
            fos.write(data,0,d);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕!耗时:"+(end-start)+"ms");
        fis.close();
        fos.close();
    }
}
